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Creamy French Onion Broccoli Casserole

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This Creamy French Onion Broccoli Casserole combines tender broccoli florets with a rich, cheesy French onion-flavored sauce and a crispy fried onion topping. It’s a cozy, crowd-pleasing side or meatless main that’s easy to make with pantry staples.

  • Total Time: 50 minutes
  • Yield: 6 to 8 servings

Ingredients

  • 4 cups fresh broccoli florets, lightly steamed
  • 1 can (10.5 oz) cream of mushroom soup
  • 1 cup sour cream
  • 1 packet French onion soup mix
  • 1 cup shredded cheddar cheese
  • 1/2 cup shredded mozzarella cheese
  • 1/2 cup crispy fried onions
  • 1/4 teaspoon black pepper
  • Salt to taste

Instructions

  1. Preheat oven to 375°F (190°C) and lightly grease a medium casserole dish.
  2. Steam broccoli until just tender but still firm, then set aside.
  3. In a large bowl, mix cream of mushroom soup, sour cream, and French onion soup mix until smooth.
  4. Stir in cheddar and mozzarella cheeses.
  5. Fold in the steamed broccoli until evenly coated.
  6. Spread mixture evenly into the prepared casserole dish.
  7. Top with crispy fried onions.
  8. Bake uncovered for 35 minutes, until bubbly and golden on top.
  9. Let rest for a few minutes before serving.

Notes

  • Use frozen broccoli if fully thawed and drained.
  • Swap sour cream with plain Greek yogurt for a lighter version.
  • Add sautéed mushrooms, garlic powder, or paprika for extra flavor.
  • Substitute cream of mushroom soup with cream of chicken or homemade sauce.
  • Make ahead and refrigerate before baking, adding a few extra minutes to cook time.
  • Author: Amelia
  • Prep Time: 15 minutes
  • Cook Time: 35 minutes
  • Category: Side Dish
  • Method: Baking
  • Cuisine: American
  • Diet: Vegetarian

Nutrition

  • Serving Size: 1 portion
  • Calories: 280
  • Sugar: 4g
  • Sodium: 580mg
  • Fat: 20g
  • Saturated Fat: 11g
  • Unsaturated Fat: 7g
  • Trans Fat: 0g
  • Carbohydrates: 13g
  • Fiber: 3g
  • Protein: 9g
  • Cholesterol: 45mg